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# Welcome to new site

Welcome to new site

### Archimedean Polyhedra

Archimedes, a scientist from Ancient Greece, discovered thirteen types of polyhedra, now called Archimedean solids, which are also referred to as semi-regular polyhedra.

### Mathematical properties of the Platonic solids

One can specify the following mathematical characteristics in each of the five Platonic solids:

1. The radius of the sphere circumscribing the polyhedron;

2. The radius of the sphere inscribed in the polyhedron;

3. The surface area of the polyhedron;

4. The volume of the polyhedron.

### Polyhedra in nature

In the natural environment, regular polyhedra can be found in the form of crystals (minerals). The form of the tetrahedron is transmitted by antimony sodium sulfate.

### Practical use of paper models

Quite often a question about a practical use of paper models pops up.  What is the point of paper modeling?

### Nets solids of revolution What happens if a flat geometric shape, such as a rectangle, begins to rotate rapidly relative to one of its sides?
We create a new geometric solid in space by rotation.

### Polyhedron. What is it? A polyhedron is a solid bounded by flat polygons, which are called faces.

### Stellated octahedron - a challenging task

This is a new, very unusual way to create a star octahedron model. The polyhedron itself was discovered in 1619 by the German mathematician and astronomer Johann Kepler.

### Divide the icosahedron (into parts)

Is it possible to make up an icosahedron using more simple polyhedra? ### Polyhedra in architecture. Part 5

Architects have used the elements of polyhedra in designing their constructions since ancient times. Nowadays this approach distinguishes buildings among thousands of others.

### The star of hope

A star is an image of divine idea and will, due to them our Light and Universe were created and started to exist in Space.